JP4739701B2 - Side pipe - Google Patents

Description

  The present invention is connected to a transfusion tube of a blood transfusion or an infusion set or a transduction tube of an extracorporeal blood circuit such as an artificial kidney used for treatment of renal failure or the like, and injects a necessary medicinal solution or the like in a timely manner (side note). This is related to the side injection tube that can be used.

A conventional side injection pipe of this type, for example, as shown in Japanese Utility Model Publication No. 3-31305, has a pipe body raised on one side surface of a main pipe having connection portions of liquid introduction tubes at both ends, and at the open end of the pipe body. A soft disc-like elastic plug (rubber plug) that can be pierced with an injection needle was press-fitted, and the upper surface was covered with a perforated cap. This conventional side injection tube injects medicinal solution etc. contained in the syringe by pushing the plunger by piercing the injection needle fixed to the tip tube of the syringe on the upper surface of the elastic stopper exposed from the hole of the cap I was able to do it. In this elastic stopper, the hole of the injection needle inserted into the elastic plug is instantly closed due to the elasticity of the material after the needle is pulled out, so that there is no problem such as liquid leakage in the treatment work such as blood transfusion or infusion.
Reality 3-31305

  However, although the elastic plug body is soft, it cannot be pulled out unless it is hard and sharp like a metal injection needle. Since there was no use other than to use such a hard and sharp needle, a protective cap was immediately applied to the injection needle after the side injection operation, and the needle was removed from the syringe together with the protective cap and discarded. Therefore, when a protective cap is applied to the injection needle, there is a high possibility of causing an accident that the needle tip of the injection needle is pierced into the finger, and when the blood of the infectious carrier is attached to the needle tip of the injection needle There was a risk of infection.

  The present invention is for solving the above-mentioned problems, and the object of the present invention is that the side note is a tip tube of a syringe (to which the base of the injection needle is coupled) without using a hard and sharp needle. It is intended to provide a side injection tube that can be surely performed by inserting a needle, prevents the needle tip from being pierced into a finger, and eliminates accidents such as nosocomial infections.

In order to achieve the above object, a side injection tube according to the present invention includes a cylindrical body having an opening narrowed in the upper part and a flow path connecting part in the lower part, and a narrowed opening of the cylindrical body. A hollow bullet body having a neck portion that is configured to close a vertical hole that is formed in advance by a compression action when pressed into the portion, and a disk-shaped bullet interposed between the hollow bullet body and the flow path connecting portion. A hollow needle at a position where the upper flange portion is embedded in the hollow portion of the hollow bullet body, and the pointed lower end can penetrate the central portion of the disk-shaped bullet body supported by the flow path connecting portion; Tona is, when pressing the hollow bullet body with previous tube of the syringe, a vertical hole which is previously formed on the neck portion, the needle trace bored in plate-like bullet body by penetration of the hollow needle is opened at the same time when the withdrawal of the previous tube of the syringe, said vertical hole and the needle trace is in close instantaneously especially By simply inserting the tip tube of the syringe into the upper opening of the cylindrical body, the vertical hole on the top surface of the neck of the hollow bullet is exposed and conducted to the cavity, and at the same time, the disk-shaped bullet is can penetrate, moreover, after the side note, when pulled ahead tube of the syringe, occlusion of the two holes is configured so that done perfectly instantaneously.

  According to the side injection tube according to the present invention, when the flow passage connecting portion of the cylindrical body is connected in advance to the blood transfusion or infusion set or the liquid introduction tube of the extracorporeal circuit, the side injection to the patient is required. In addition, when the tip tube of a syringe containing a necessary amount of necessary chemical solution or the like was inserted into the upper opening of the cylindrical body, the neck of the hollow bullet lowered from the opening to the non-stenotic position and was closed until then. The vertical hole is exposed and conducted to the cavity. At the same time, the hollow needle provided in the cavity penetrates the disk-shaped bullet located in contact with the flow path such as the extracorporeal blood circuit. Accordingly, when the plunger of the syringe is pushed in this state, the medicinal solution or the like is laterally injected through the vertical hole on the top surface of the neck of the hollow bullet and the inner hole of the hollow needle penetrating the disk-like bullet. After the side injection, when the front tube of the syringe is escaped from the upper opening of the cylindrical body, the hollow bullet returns to the old form due to the elasticity of the material, and the neck becomes the opening of the cylindrical body. It is reinserted and the vertical hole is instantly closed by pressure from the surroundings. At the same time, the hollow needle comes out of the disk-shaped bullet, and the needle mark of the disk-shaped bullet that the hollow needle has pierced closes instantaneously due to the elasticity of the material. By this double sealing performed instantaneously, the backflow of the liquid flowing through the liquid introduction tube is surely prevented. In this way, the side injection tube can reliably prevent the needle tip from being pierced into the finger because the side injection can be performed simply by inserting the tip tube of the syringe without using a hard and sharp needle. It has an excellent effect of eliminating accidents such as infection.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view of the injection pipe on the side of the present application, FIG. 2 is a partial sectional view showing a state of deformation of a hollow bullet body by an insert from an opening of a cylindrical body, and FIG. 3 is a case where it is connected to a T-shaped tube. It is front sectional drawing shown.

  Reference numeral 1 denotes an application side injection pipe. The application side injection pipe 1 has an opening 2 narrowed at an upper portion thereof, and a bottom surface thereof is opened in a cylindrical body 4 having a flow path connection portion 3 at a lower portion thereof. A hollow bullet 5 is provided, and a disk-like bullet 6 is interposed between the lower surface of the hollow bullet 5 and the upper surface of the flow path connecting portion 3. These hollow bullet body 5 and disk-shaped bullet body 6 are made of a material having good elastic performance made of silicon resin. Of course, the material is not limited to silicon resin as long as the material has the same effect.

  The hollow bullet body 5 is loaded in a space above the cylindrical body 4 including the opening 2. The hollow bullet 5 has a vertical hole 7 leading to the cavity 5b on the top surface of the neck 5a. This vertical hole 7 is a state in which the neck 5a of the hollow bullet 5 is press-fitted into the opening 2 of the cylindrical body 4 (normal time) by the compression action of the narrowed opening 2, that is, tightening from the surroundings, Although it is blocked as shown in FIG. 1 (the closed state is shown by a single line in FIG. 1), as shown in FIG. When the insert 8 is inserted and the neck portion 5a of the hollow bullet 5 is lowered to the non-stenosis position, the vertical hole 7 is revealed (conducted to the cavity 5b) by being released from the narrowing (squeezing) of the opening 2. It has become.

  Further, in the hollow portion 5 b of the hollow bullet body 5, when the hollow bullet body 5 is compressed downward by the insert 8 from the opening portion 2 of the cylindrical body 4 as shown in FIG. A hollow needle 9 that can penetrate 6 is provided. The hollow needle 9 is the same as an injection needle (a metal needle or a plastic needle can be used) with a sharpened lower end, and a collar portion 9 a at the upper end is embedded in the inner wall of the hollow portion 5 b of the hollow bullet body 5. In a state where the hollow needle 9 penetrates the disk-shaped bullet 6, the exposed vertical hole 7 on the top surface of the hollow bullet 5 is formed in the inner hole 9 b of the hollow needle 9 that penetrates the disk-shaped bullet 6. It becomes conductive (opened) as A → A ′.

  Since the disk-shaped bullet 6 is made of a material having good elastic performance such as silicon resin as described above, the insert 8 such as the tip of the syringe is inserted from the opening 2 at the top of the cylindrical body 4. When the hollow needle 9 comes out as the hollow bullet 5 is returned to its old form, the needle mark 10 of the hollow needle is also instantaneously closed. In this state, the neck 5 a of the hollow bullet 5 is also reinserted into the opening 2 of the cylindrical body 4 and returns to the same state as in FIG. 1, so that the vertical hole 7 is also instantly closed by the narrowing of the opening 2. Therefore, a double seal between the vertical hole 7 of the hollow bullet 5 and the needle mark (shown by a one-dot chain line in FIG. 1) 10 of the disc-like bullet 6 is instantaneously and perfectly performed, and the liquid guide tube flows. Thus, it is possible to reliably prevent the backflow of the liquid being applied.

  As shown in FIG. 3, the injection pipe 1 on the application side is a vertical tube 12 of a T-shaped tube 12 connected in the middle of a liquid conducting tube 11 of an extracorporeal blood circuit (or blood transfusion or infusion set) via a flow path connecting portion 3. ′ Is used with a taper connection. In this case, in order to ensure the taper coupling, a female screw cylinder 14 is provided around the flow path connecting portion 3, and the female screw cylinder 14 is provided on the outer periphery of the mouth end of the vertical tube 12 ′. It is more preferable that it is configured so that it can be meshedly connected. Of course, the injection tube 1 on the side of the present application is not shown, but is a Y-shaped tube branched from the middle of the liquid introduction tube 11 of the extracorporeal blood circuit (or transfusion or infusion set). It may be used by being coupled to the end of the branch pipe in the same manner as described above.

  Next, the operation of the present invention will be described. Now, the flow path connection portion 3 of the application side injection tube 1 is connected in the middle of the liquid introduction tube 11 of the extracorporeal blood circuit (or blood transfusion or infusion set) as shown in FIG. The T-shaped tube 12 is connected and set to the vertical tube 12 '. In this state, the neck 5a of the hollow bullet 5 in the cylindrical body 4 of the application side pipe 1 is fitted into the opening 2, the vertical hole 7 is also closed, and the bottom and flow paths of the hollow bullet 5 are closed. Since the disk-like bullet 6 interposed between the upper surface of the connecting portion 3 is also in a closed state, the liquid flowing through the liquid introduction tube is contained in the cylindrical body 4 of the application side injection tube 1. Does not enter or leak outside.

  Thus, when a side injection is required for a patient undergoing treatment through an extracorporeal blood circuit (or transfusion or infusion set), a necessary amount of a necessary drug solution or the like is first stored in the syringe S. Next, when the tip tube S ′ of the syringe S is inserted into the opening 2 at the top of the tubular body 4 constituting the application side injection tube 1 as shown in FIG. The neck 5a is lowered to the non-stenosis position (see FIG. 2). As a result, the vertical hole 7 that has been closed becomes apparent and is electrically connected to the cavity 5b.

  At the same time, as the hollow bullet 5 is compressed downward, the hollow needle 9 provided in the hollow portion 5 b penetrates the disk-like bullet 6. When the plunger of the syringe S is pushed in this state, the drug solution or the like in the syringe S is injected into the hollow portion 5b through the vertical hole 7 on the top surface of the hollow bullet 5 and is further formed into a disk-like bullet. 6 is side-poured into the liquid passing through the liquid guide tube 11 through the inner hole 9 b of the hollow needle 9 penetrating through 6.

  Thus, after the side injection of a necessary amount of the chemical solution or the like accommodated in the syringe S is completed, when the front tube S ′ of the syringe S is escaped from the upper opening 2 of the cylindrical body 4, the hollow bullet The body 5 returns to the old form (shape memory) due to the elasticity of the material, the neck portion reinserts into the opening 2 of the cylindrical body, and the vertical hole 7 is instantaneously closed by the pressure from the surroundings. In addition, the hollow needle 9 is removed from the disk-shaped bullet 6 by returning the hollow bullet to the old form, and the needle mark 10 of the disk-shaped bullet that is stuck in the hollow needle 9 is also instantaneously closed due to the elasticity of the material.

  Therefore, even after the side injection, the tip tube S ′ of the syringe S is escaped from the upper opening 2 of the cylindrical body 4 and thus is instantly double-sealed, so that the liquid flowing through the liquid introduction tube 11 Backflow and liquid leakage can be reliably prevented.

  As described above, the side injection tube can reliably prevent the needle tip from being pierced into the finger by simply inserting the tip tube of the syringe without using a hard and sharp needle as described above. Since there is no accident such as infection, the availability in hospitals and other places is extremely high.

It is front sectional drawing of this application side injection pipe. It is a fragmentary sectional view which shows the state of a deformation | transformation of a hollow bullet body with the insert from the opening part of a cylindrical body. It is front sectional drawing which shows this application side injection tube connected to the T-shaped tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Application side side injection pipe 2 Opening part 3 Flow path connection part 4 Cylindrical body 5 Hollow bullet body 6 Disc-shaped bullet body 5a Neck part 5b Cavity 7 Vertical hole 8 Insert 9 Hollow needle 9a Eave part 9b Inner hole 10 Needle trace 11 Liquid introduction Tube 12 T-tube 12 'Longitudinal tube 12 "Male thread 14 Female thread cylinder

Claims (1)

A cylindrical body having a narrowed opening in the upper part and a flow path connecting part in the lower part, and a vertical hole formed in advance by the press-fitting into the narrowed opening of the tubular body is closed by the compression action A hollow bullet having a neck portion, a disk-like bullet interposed between the hollow bullet and the flow path connecting portion, and an upper collar portion embedded in the hollow portion of the hollow bullet is, when the pointed lower end presses a hollow needle in a position that can penetrate the central portion of the discoidal elastic-body is supported in the flow path connection unit, Tona is, the hollow bullet body with previous tube of the syringe When the vertical hole previously formed in the neck portion and the needle trace opened in the disk-shaped bullet by the penetration of the hollow needle are simultaneously opened, and the tip tube of the syringe is pulled out, the vertical hole and the needle trace are A side injection tube characterized by the fact that is designed to close instantly .

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